KLS-3021, a multifunctional oncolytic virus, demonstrates potent early-intervention efficacy in preclinical models of prostate-confined and locally advanced prostate cancer. (PubMed, Front Oncol)
Mice were randomized to receive vehicle, docetaxel, or KLS-3021, administered on day 9 (prostate-confined) or day 29 (visible/locally invasive) after implantation of luciferase-labeled PC-3 cells. Mechanistic analyses revealed extracellular matrix degradation, enhanced viral spread, increased immune cell infiltration, M1 macrophage polarization, and features of immunogenic cell death in KLS-3021-treated tumors. These results collectively demonstrate the translational potential of KLS-3021 as a minimally invasive or neoadjuvant therapeutic strategy for prostate cancer, especially in patients for whom early, localized intervention is medically feasible.